6060
6161@ SuppressWarnings ("static-method" )
6262@ ExportLibrary (InteropLibrary .class )
63- public abstract class WasmGlobal extends EmbedderDataHolder implements TruffleObject {
63+ public final class WasmGlobal extends EmbedderDataHolder implements TruffleObject {
6464
6565 private final ValueType valueType ;
6666 private final boolean mutable ;
6767
68- protected WasmGlobal (ValueType valueType , boolean mutable ) {
68+ private long globalValue ;
69+ private Object globalObjectValue ;
70+
71+ private WasmGlobal (ValueType valueType , boolean mutable ) {
6972 this .valueType = valueType ;
7073 this .mutable = mutable ;
7174 }
7275
73- public final ValueType getValueType () {
76+ public WasmGlobal (ValueType valueType , boolean mutable , int value ) {
77+ this (valueType , mutable , (long ) value );
78+ }
79+
80+ public WasmGlobal (ValueType valueType , boolean mutable , long value ) {
81+ this (valueType , mutable );
82+ assert ValueType .isNumberType (getValueType ());
83+ this .globalValue = value ;
84+ }
85+
86+ public WasmGlobal (ValueType valueType , boolean mutable , Object value ) {
87+ this (valueType , mutable );
88+ this .globalValue = switch (valueType ) {
89+ case i32 -> (int ) value ;
90+ case i64 -> (long ) value ;
91+ case f32 -> Float .floatToRawIntBits ((float ) value );
92+ case f64 -> Double .doubleToRawLongBits ((double ) value );
93+ default -> 0 ;
94+ };
95+ this .globalObjectValue = switch (valueType ) {
96+ case v128 , anyfunc , externref -> value ;
97+ default -> null ;
98+ };
99+ }
100+
101+ public ValueType getValueType () {
74102 return valueType ;
75103 }
76104
77- public final boolean isMutable () {
105+ public boolean isMutable () {
78106 return mutable ;
79107 }
80108
81- public final byte getMutability () {
109+ public byte getMutability () {
82110 return mutable ? GlobalModifier .MUTABLE : GlobalModifier .CONSTANT ;
83111 }
84112
85- public abstract int loadAsInt ();
113+ public int loadAsInt () {
114+ assert ValueType .isNumberType (getValueType ());
115+ return (int ) globalValue ;
116+ }
86117
87- public abstract long loadAsLong ();
118+ public long loadAsLong () {
119+ assert ValueType .isNumberType (getValueType ());
120+ return globalValue ;
121+ }
88122
89- public abstract Vector128 loadAsVector128 ();
123+ public Vector128 loadAsVector128 () {
124+ assert ValueType .isVectorType (getValueType ());
125+ assert globalObjectValue != null ;
126+ return (Vector128 ) globalObjectValue ;
127+ }
90128
91- public abstract Object loadAsReference ();
129+ public Object loadAsReference () {
130+ assert ValueType .isReferenceType (getValueType ());
131+ assert globalObjectValue != null ;
132+ return globalObjectValue ;
133+ }
92134
93- public abstract void storeInt (int value );
135+ public void storeInt (int value ) {
136+ assert ValueType .isNumberType (getValueType ());
137+ this .globalValue = value ;
138+ }
94139
95- public abstract void storeLong (long value );
140+ public void storeLong (long value ) {
141+ assert ValueType .isNumberType (getValueType ());
142+ this .globalValue = value ;
143+ }
96144
97- public abstract void storeVector128 (Vector128 value );
145+ public void storeVector128 (Vector128 value ) {
146+ assert ValueType .isVectorType (getValueType ());
147+ this .globalObjectValue = value ;
148+ }
98149
99- public abstract void storeReference (Object value );
150+ public void storeReference (Object value ) {
151+ assert ValueType .isReferenceType (getValueType ());
152+ this .globalObjectValue = value ;
153+ }
100154
101155 public static final String VALUE_MEMBER = "value" ;
102156
103157 @ ExportMessage
104- final boolean hasMembers () {
158+ boolean hasMembers () {
105159 return true ;
106160 }
107161
108162 @ ExportMessage
109163 @ TruffleBoundary
110- final boolean isMemberReadable (String member ) {
164+ boolean isMemberReadable (String member ) {
111165 return VALUE_MEMBER .equals (member );
112166 }
113167
114168 @ ExportMessage
115169 @ TruffleBoundary
116- final Object readMember (String member ) throws UnknownIdentifierException {
170+ Object readMember (String member ) throws UnknownIdentifierException {
117171 if (!isMemberReadable (member )) {
118172 throw UnknownIdentifierException .create (member );
119173 }
@@ -130,19 +184,19 @@ final Object readMember(String member) throws UnknownIdentifierException {
130184
131185 @ ExportMessage
132186 @ TruffleBoundary
133- final boolean isMemberModifiable (String member ) {
187+ boolean isMemberModifiable (String member ) {
134188 return VALUE_MEMBER .equals (member ) && isMutable ();
135189 }
136190
137191 @ ExportMessage
138192 @ TruffleBoundary
139- final boolean isMemberInsertable (@ SuppressWarnings ("unused" ) String member ) {
193+ boolean isMemberInsertable (@ SuppressWarnings ("unused" ) String member ) {
140194 return false ;
141195 }
142196
143197 @ ExportMessage
144198 @ TruffleBoundary
145- final void writeMember (String member , Object value ,
199+ void writeMember (String member , Object value ,
146200 @ CachedLibrary (limit = "5" ) InteropLibrary valueLibrary ) throws UnknownIdentifierException , UnsupportedMessageException {
147201 if (!isMemberReadable (member )) {
148202 throw UnknownIdentifierException .create (member );
@@ -179,7 +233,7 @@ final void writeMember(String member, Object value,
179233
180234 @ ExportMessage
181235 @ TruffleBoundary
182- final Object getMembers (@ SuppressWarnings ("unused" ) boolean includeInternal ) {
236+ Object getMembers (@ SuppressWarnings ("unused" ) boolean includeInternal ) {
183237 return new WasmNamesObject (new String []{VALUE_MEMBER });
184238 }
185239}
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